Replace, not append

Author: NexusSfan

.github/workflows/doccheck.yaml

@@ -28,6 +28,7 @@ jobs:
           comment-id: 3478184596
           body: ${{ steps.doccheck.outputs.stdout }}
           token: ${{ secrets.GITHUB_TOKEN }}
+          edit-mode: replace
       - name: Lock issue
         run: gh issue lock https://github.com/NexusSfan/lillydecomp/issues/2
         env: